Rinnai REU-2018W Service Manual page 25

B
No
Flame detected
(1µA or over)
Yes
Sparker OFF
Combustion indicator Red
13 Change-over sld SV3 Open
Hot water is sensed
Water flow servo control
14
Fan rpm control
1
Modulating valve control
Change-over sld SV3 cntrl
No
Safety device
normal?
Yes
Infinity REU-2425W
C
Yes
No
Ignition failure
11 Flashing
( 3 attempts )
12 Flashing
16 Flashing
Flame failure safety
Hot water temp
device operational
105 °C or over
(less than 1µA)
14 Flashing
Thermal fuse melted
Over-heat switch operating
TURN O F F
Hot water tap
Water flow sensor
Combustion indicator
Main gas sld SV1
Change-over sld SV2
Change-over sld SV3
Modulating valve
Post fan stops
(65 sec)
A
ON/OFF switch
Indicators
D
Combustion indicator OFF
32 Flashing
Thermistor faulty
(open or short
circuit)
52 Flashing
12 Flashing
Modulating solenoid
Earthing
valve abnormal
detection
OFF
OFF
OFF
Closed
Closed
Closed
OFF
No
Yes
OFF
OFF
- 22-
61 Flashing
10 Flashing
Combustion fan
Fan power flow
rpm abnormal abnormal
71 Flashing
Solenoid valve
circuit abnormal
Issue 2 - 24/06/04 ©Rinnai